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INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill [Table Text Block] The components of intangible assets consisted of the following as of the dates set forth below (amounts in thousands):
 
Weighted Average Useful Lives (in years) September 30, 2018
 
September 30,
2018
 
December 31,
2017
Amortizable intangible assets:
 
 
 
 
 
     Customer relationships
8.9
 
$
13,274

 
$
13,922

     Patents, trademarks and other
7.6
 
14,022

 
15,208

          Total at cost
 
 
27,296

 
29,130

     Less accumulated amortization
 
 
(14,857
)
 
(13,855
)
 
 
 
$
12,439

 
$
15,275
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] The estimated aggregate amortization expense at September 30, 2018, for each of the years (or other periods) set forth below was as follows (amounts in thousands):
October 1 - December 31, 2018
$
490

2019
2,091

2020
2,074

2021
1,440

2022
1,012

Thereafter
5,332

 
$
12,439